Scapadas Magicas had been cited repeatedly during the last two years for safety violations including brake problems. Federal inspectors investigated the company's two other motorcoaches after the crash and found "serious mechanical safety violations."

Anne Ferro, head of the FMCSA, said Friday after the quick inspections, regulators "immediately shut them down."

The company's bus had been returning to Tijuana, Mexico, after a ski trip when it crashed on a mountain road east of San Bernardino and struck a sedan and a pickup. Seven passengers on the bus were killed, as was the driver of another vehicle.